Backup vaults overview
This article describes the features of a Backup vault. A Backup vault is a storage entity in Azure that houses backup data for certain newer workloads that Azure Backup supports. You can use Backup vaults to hold backup data for various Azure services, such as Azure Blobs and newer workloads that Azure Backup will support. Backup vaults make it easy to organize your backup data, while minimizing management overhead. Backup vaults are based on the Azure Resource Manager model of Azure, which provides features such as:
Enhanced capabilities to help secure backup data: With Backup vaults, Azure Backup provides security capabilities to protect cloud backups. The security features ensure you can secure your backups, and safely recover data, even if production and backup servers are compromised. Learn more
Azure role-based access control (Azure RBAC): Azure RBAC provides fine-grained access management control in Azure. Azure provides various built-in roles, and Azure Backup has three built-in roles to manage recovery points. Backup vaults are compatible with Azure RBAC, which restricts backup and restore access to the defined set of user roles. Learn more
Data isolation: With Azure Backup, the vaulted backup data is stored in Azure-managed Azure subscription and tenant. External users or guests have no direct access to this backup storage or its contents, which ensures the isolation of backup data from the production environment where the data source resides. This robust approach ensures that even in a compromised environment, existing backups can't be tampered or deleted by unauthorized users.
Storage settings in the Backup vault
A Backup vault is an entity that stores the backups and recovery points created over time. The Backup vault also contains the backup policies that are associated with the protected resources.
Azure Backup automatically handles storage for the vault. Choose the storage redundancy that matches your business needs when creating the Backup vault.
To learn more about storage redundancy, see these articles on geo, zonal (preview), and local redundancy.
Encryption settings in the Backup vault
This section discusses the options available for encrypting your backup data stored in the Backup vault. Azure Backup service uses the Backup Management Service app to access Azure Key Vault, but not the managed identity of the Backup vault.
Encryption of backup data using platform-managed keys
Azure Backup provides you two options (Microsoft managed keys and Customer Managed keys) to manage the backup data encryption for your Backup vault. By default, all your data is encrypted using Microsoft managed keys. Azure Backup uses the Backup Management Service app to access Azure Key Vault, but not the managed identity of the Backup vault.
You can fetch your own keys to encrypt the backup data by using the Customer Managed Keys option under Encryption settings on the Backup vault.